PDF malware analysis — malicious · 603534ff634fc844

MALICIOUS

PDF

50.3 KB Created: 2021-06-08 23:43:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 583516019026b5769cb9f7f9f4795a45 SHA-1: a9848e76e28636763af3a4563518fb5e70a30884 SHA-256: 603534ff634fc844dcecbbcdccb1f84416f336ba7e774c9d8a79db25f16014bf

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links, including one to a 'roblox-script-hack' page, and another to a PDF file hosted on kabadixpress.com. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://netcdn.tw/app/431946152/roblox-script-hack--game-hack PDF link annotation
- https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master--hack_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/what-is-pubg-uc-carding_GM1330123889.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/play-coin-master-online-free_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://www.kabadixpress.com/uploaded_files/userfiles/files/roblox-gang_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000052b4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x52B4	28900 bytes
SHA-256: `da7a520159f722ec95d8ecff8799f4c27d234ac0000701d3c6302d1b18ea76f1`
`font_01_sfnt_off000093e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93E3	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off0000a0f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA0F4	18580 bytes
SHA-256: `c1944f3c26fd870ce0e5de863125d21882df0ce96ba9356e52db8af51b5248a2`

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